Getting phone number from contacts

I want to take a phone number from contacts and use it elsewhere. I might put it in a calendar entry if I need to call someone. Or put it in a document. I may to go back and forth between the apps to get a full phone number, perhaps with extensions, then verify. And some places I want to paste the number will close, which requires that I jot down the phone number to copy between apps.

It's not uncommon for me to be on a conference call, going through my copies of a presentation, and need to add a todo on my list that includes the phone number.

But attempts to do so make my mac begin a facetime call. Or doesn't work.

I've tried clicking to the left and right of the field, right clicking, etc. IF I click just right (not sure how), it opens the item up for editing and then I can copy the phone number.

It seems that this is something needed frequently by almost everyone. Since I don't see others asking this question there must be something obvious to everyone else but not me. I've searched "copy phone number from contacts" here and elsewhere and maybe it's something that only I need.

How do I copy a phone number from contacts so I can use in another application? Considering all the possibilities that Apple provides (ctrl-c, adding fn, adding shift, adding command, adding shift, adding more than one of these, right click, clicking in a certain spot), how might I remember the correct choice without calling someone? Am I missing something? Is there a reason I should not be doing this?